 He later fought as an infantry officer in the war against Japan, and, after the defeat of the Japanese, in the Chinese Civil War, which led to the establishment of the People's Republic of China in 1949.With the creation of the new Communist government, Wang Dongxing was named Deputy Director of the General Office of the Communist Party of China (an important bureaucratic position dealing with administration and personnel) and, crucially, Director of the 9th Bureau of the Ministry of Public Security, in charge of Mao Zedong's personal security detail, and also of protecting Zhongnanhai, the seat of government power.The 9th Bureau included the "8341 Special Regiment".